:root {
  --bg: #0f1419;
  --card: #1a2129;
  --border: #2a333d;
  --text: #e7edf3;
  --muted: #8b98a5;
  --in: #34d399;
  --out: #f87171;
  --accent: #34d399;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.error { color: var(--out); font-size: 13px; min-height: 18px; margin: 4px 0; }
.brand { font-weight: 700; font-size: 18px; letter-spacing: -0.3px; }
.brand::first-letter { color: var(--accent); }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.btn {
  border: 1px solid var(--border);
  background: #222b35;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #06281c; font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.link { background: none; border: none; color: var(--accent); }
.select, input {
  background: #121820;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
}
input:focus, .select:focus { outline: none; border-color: var(--accent); }

/* auth */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; }
.auth-card { width: 340px; display: flex; flex-direction: column; gap: 12px; }
.auth-card h1 { margin: 0; }

/* app */
.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 20px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: var(--bg); z-index: 5;
}
.spacer { flex: 1; }
.container { max-width: 960px; margin: 0 auto; padding: 20px; display: flex; flex-direction: column; gap: 16px; }

.periods { display: flex; gap: 8px; align-items: center; }
.period {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  border-radius: 999px; padding: 6px 16px; cursor: pointer;
}
.period.active { background: var(--accent); border-color: var(--accent); color: #06281c; font-weight: 600; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat strong { font-size: 22px; font-variant-numeric: tabular-nums; }
.in { color: var(--in); }
.out { color: var(--out); }

.charts { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; }
.charts h3, .card h3 { margin: 0 0 12px; font-size: 14px; color: var(--muted); font-weight: 600; }
.chart { min-height: 160px; }
.chart svg { width: 100%; height: auto; display: block; }
.donut { display: flex; align-items: center; gap: 16px; }
.donut svg { width: 140px; flex: none; }
.legend { font-size: 12px; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.legend .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.legend .li { display: flex; justify-content: space-between; gap: 8px; }
.legend .li span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.row.end { justify-content: flex-end; }

/* transactions */
#txn-list { display: flex; flex-direction: column; }
.txn {
  display: grid; grid-template-columns: 28px 1fr auto; gap: 10px; align-items: center;
  padding: 10px 4px; border-top: 1px solid var(--border);
}
.txn:first-child { border-top: none; }
.txn .ico {
  width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  font-size: 14px; font-weight: 700;
}
.txn .ico.in { background: rgba(52, 211, 153, 0.12); color: var(--in); }
.txn .ico.out { background: rgba(248, 113, 113, 0.12); color: var(--out); }
.txn .note { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.txn .meta { color: var(--muted); font-size: 12px; }
.txn .amt { font-variant-numeric: tabular-nums; font-weight: 600; text-align: right; }
.txn .del { visibility: hidden; background: none; border: none; color: var(--muted); cursor: pointer; font-size: 14px; }
.txn:hover .del { visibility: visible; }
.day-group { color: var(--muted); font-size: 12px; margin: 14px 0 4px; text-transform: uppercase; letter-spacing: 0.5px; }

/* modal */
.modal-back {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.6);
  display: grid; place-items: center; z-index: 10;
}
.modal { width: 380px; display: flex; flex-direction: column; gap: 12px; }
.modal label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.modal input, .modal select { width: 100%; }
.dir-toggle { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.dir { padding: 10px; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--muted); cursor: pointer; font-weight: 600; }
.dir.active[data-dir="out"], #dir-out.active { background: rgba(248, 113, 113, 0.15); color: var(--out); border-color: var(--out); }
#dir-in.active { background: rgba(52, 211, 153, 0.15); color: var(--in); border-color: var(--in); }
.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pill {
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px;
  font-size: 13px; cursor: pointer; color: var(--muted); background: transparent;
}
.pill.active { border-color: var(--accent); color: var(--accent); }

pre {
  background: #121820;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  overflow-x: auto;
  white-space: pre;
}
code { color: var(--accent); }

@media (max-width: 720px) {
  .charts, .cards { grid-template-columns: 1fr; }
  .topbar { flex-wrap: wrap; }
}